(A) Culture of human fetal pancreatic cells in restrictive medium (RPMI 1640 with 0.5% FBS) eliminated the contaminating cells and allowed survival of the pMSC which acquired characteristic spindle-shaped morphology (original magnification × 40).
(B) Expansion medium (RPMI 1640 with 10% FBS and growth factors) induced rapid proliferation of the pancreas-derived mesenchymal stem cells (pMSC). Cells are shown at passage 7 (original magnification, × 10). (C) pMSC growth rate in culture. The x-axis represents the number of incubation days and the y-axis represents cumulative cell numbers.